Re: Google Gmail mailing list bounces

[Emanuel Berg]

Bob Proulx wrote:

>   $ dig _dmarc.zoho.eu txt +short
>   "v=DMARC1; p=reject; sp=reject; fo=0;
> rua=mailto:dmarc.reports.eu@zoho.eu;
> ruf=mailto:dmarc.reports.eu@zoho.eu";

Afer figuring out this command, which wasn't
easy [1], I get two different replies from
executing it. This is by far the most common
one:


    "v=DMARC1; p=reject; sp=reject; fo=0; rua=mailto:dmarc.reports.eu@zoho.eu; 
ruf=mailto:dmarc.reports.eu@zoho.eu";

    ;; ->>HEADER<<- opcode: QUERY; status: NXDOMAIN; id: 10174
    ;; Flags: qr rd ra; QUERY: 1; ANSWER: 0; AUTHORITY: 0; ADDITIONAL: 0

    ;; QUESTION SECTION:
    ;; 
v\=DMARC1\;p\=reject\;sp\=reject\;fo\=0\;rua\=mailto\:dmarc.reports.eu\@zoho.eu\;ruf\=mailto\:dmarc.reports.eu\@zoho.eu.
         IN      A

    ;; Received 122 B
    ;; Time 2019-05-24 07:27:26 CEST
    ;; From 192.168.10.1@53(UDP) in 1.0 ms


But once, one time, after several invocations I got this:


    "v=DMARC1; p=reject; sp=reject; fo=0; rua=mailto:dmarc.reports.eu@zoho.eu; 
ruf=mailto:dmarc.reports.eu@zoho.eu";

    ;; ->>HEADER<<- opcode: QUERY; status: NXDOMAIN; id: 14566
    ;; Flags: qr rd ra; QUERY: 1; ANSWER: 0; AUTHORITY: 1; ADDITIONAL: 0

    ;; QUESTION SECTION:
    ;; 
v\=DMARC1\;p\=reject\;sp\=reject\;fo\=0\;rua\=mailto\:dmarc.reports.eu\@zoho.eu\;ruf\=mailto\:dmarc.reports.eu\@zoho.eu.
         IN      A

    ;; AUTHORITY SECTION:
    eu.                         600     IN      SOA     nl.dns.eu. 
tech.eurid.eu. 1053404310 3600 1800 3600000 600

    ;; Received 176 B
    ;; Time 2019-05-24 07:25:22 CEST
    ;; From 192.168.10.1@53(UDP) in 28.0 ms


Questions:

    Why does one get two different replies?

    What does 122 B and 176 B mean?

    What does the authority section mean?

    Where can you see their mailing list policy?


[1] https://tools.ietf.org/html/rfc7489

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